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Tower controller reported ILS on standby, but flight crew detected no malfunction. Approached and landed normally to low minimums.
| Attributes | |
| ACN | 110948 |
| Time | |
| Date | 198905 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : pvd |
| State Reference | RI |
| Altitude | msl bound lower : 300 msl bound upper : 1800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oqi tower : pvd |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent : approach landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 10000 flight time type : 200 |
| ASRS Report | 110948 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 100 flight time total : 6500 flight time type : 4000 |
| ASRS Report | 110947 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
Narrative:
During initial stage of approach, quonset approach advised ILS system had been 'in and out' all day. They didn't know what the problem was. All aircraft instruments were normal--good identify, no localizer or G/south flags. Also, the ATIS said nothing about any abnormalities. The approach was continued. Aircraft was switched to tower frequency. Once inside OM, tower advised localizer had gone to standby. We rechked our instruments. Everything was normal. Approach and landing were successfully completed. I feel the ILS should have been decommissioned or at least shut down until the unknown problems were resolved. Neither the first officer nor myself had ever heard the term 'localizer has gone to standby.' by not shutting down the ILS and issuing a NOTAM, we were placed in a difficult situation. Non standard phraseology on the radio was very misleading.
Original NASA ASRS Text
Title: TWR CTLR REPORTED ILS ON STANDBY, BUT FLT CREW DETECTED NO MALFUNCTION. APCHED AND LANDED NORMALLY TO LOW MINIMUMS.
Narrative: DURING INITIAL STAGE OF APCH, QUONSET APCH ADVISED ILS SYS HAD BEEN 'IN AND OUT' ALL DAY. THEY DIDN'T KNOW WHAT THE PROB WAS. ALL ACFT INSTRUMENTS WERE NORMAL--GOOD IDENT, NO LOC OR G/S FLAGS. ALSO, THE ATIS SAID NOTHING ABOUT ANY ABNORMALITIES. THE APCH WAS CONTINUED. ACFT WAS SWITCHED TO TWR FREQ. ONCE INSIDE OM, TWR ADVISED LOC HAD GONE TO STANDBY. WE RECHKED OUR INSTRUMENTS. EVERYTHING WAS NORMAL. APCH AND LNDG WERE SUCCESSFULLY COMPLETED. I FEEL THE ILS SHOULD HAVE BEEN DECOMMISSIONED OR AT LEAST SHUT DOWN UNTIL THE UNKNOWN PROBS WERE RESOLVED. NEITHER THE F/O NOR MYSELF HAD EVER HEARD THE TERM 'LOC HAS GONE TO STANDBY.' BY NOT SHUTTING DOWN THE ILS AND ISSUING A NOTAM, WE WERE PLACED IN A DIFFICULT SITUATION. NON STANDARD PHRASEOLOGY ON THE RADIO WAS VERY MISLEADING.
Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.